Electric fan



FIG. 1 is a front elevational view of an electric fan showing my design;

FIG. 2 is a rear elevational view thereof;

FIG. 3 is a right elevational view thereof;

FIG. 4 is a left elevational view thereof;

FIG. 5 is a top plan view thereof;

FIG. 6 is a bottom plan view thereof;

FIG. 7 is a top, front, right perspective view thereof; and,

FIG. 8 is a top, front, left perspective view thereof.

Broken lines indicate features of the electric fan which do not form any part of the claimed design. 

CLAIM The ornamental design for an electric fan, as shown and described. 